Gas Lead Additive
Burning Brakes
Joined: Sep 2005
Posts: 755
Likes: 1
From: Hobart Tasmania
I use premium unleaded 95% and also put in a flash lube, the heads have hardened seats. I know it isn't really necessary but I want keep the BB going for as long as possible and the little miles it runs up doesn't matter in cost. I also don't pay for the flash lube.
CF Community Team
Joined: Oct 2004
Posts: 19,373
Likes: 5,253
From: Cape Cod, Mass.
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No. The need for lead in these older engines is a myth. I run my 68 427 on unleaded 93. No problems. My 65 350 horse with 11:1 compression runs better on unleaded than it did on leaded. No hardened valve seats in either engine. The 65's engine was last rebuilt in 87. No problems.
